Grr Wired Calyx Fail!

I am trying to make wired calyxes for cherry blossoms, and every time I try, the ball of gumpaste, or Mexican hat shape, just falls apart. I have kneaded shortening into the gumpaste, and also a dab of water, to try to make it grab the wire, but no luck.

I have lots of blossoms to do for a cherry branch. I have a mold for the blossoms, so no worries there. I just can't get these bases!

I am using some gumpaste that I colored about two weeks ago, then stored in wrap and ziplock. I thought it had kneaded up pretty well, but maybe I'll try a fresh bit. I actually am OK with all white blossoms, or can use just a touch of color after.